Spark-plug locking device



Oct. 7, 1924. 1,511,001

I J. PADDEN SPARK PLUG LOCKING DEVICE Filed Feb. 6, 192a 311 04271107, 1 7 Paddm Patented ct. 7, 1924.

JAMES PADDEN, or CYLON, Wisconsin.

SPARK-PLUG LOCKING DEVICE.

Application filed February 6, 1922.

I I To all whom it may concern:

Be it known that T, JAMES PADDEN, a citizen of the United States, residing at Cylon, Wisconsin, St. Croix County, have invented a Spark-Plug Locking Device, of which the following is a specification.

The invention relates to spark plug looking devices, and has for its object to provide a device of this character, which device is simple in construction and may be easily and quickly placed in position over adjacent spark plugs after the wires have been disconnected therefrom, thereby preventing unauthorized persons from starting the engine on which the spark plugs are disposed.

A further object is to provide a spark plug locking device, said device comprising a bar having chamberec extensions at the ends thereof for the reception of adjacent spark plugs after wires have been disconnected therefrom. A right angularly disposed arm carried by the bar, and means for locking said arm to the engine casing in a manner whereby it cannot be disconnected from the casing, without removing a lock therefrom.

With the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawing, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings Figure 1 is a top plan view of the device, showing the same applied to a conventional form of engine.

Figure 2 is a side elevation of the device and a portion of an engine, parts being shown in section to better illustrate the structure.

Referring to the drawing, the numeral 1 designates a portion of a conventional form of internal combustion engine and 2 spark plugs carried by the upper side of said engine. Secured to the engine 1, is a bar 1, and extending upwardly from the bar 4 is a loop 6, which is adapted to receive the bail 7 of the lock 8. After said loop 6 has vice removed.

Serial No. 534,531.

been passed upwardly through the aperture 9 in the arm 10, and consequently said arm 10 cannot be raised upwardly and the de- Arm 10 at one of itsends is provided with a right 'angularly disposed bar 12, preferably formed integral with the arm 10, and which is adapted to overlie adjacent spark plugs -2. However the under side of the bar 12 at its ends is provided with downwardly extending cylindrical chambered members 13, in the chambers 14 of which spark plugs 2 are received after the wires 15 have been disconnected from the spark plugs for breaking the circuit.

The cylindrical members 13 entirely house the portions of the spark plugs which are disposed outside the engine 1, and consequently after the lock 8 has been placed in position, it will be impossible for an unauthorized person to place the wires 15 on the spark plugs 2, without first removing the lock 8.

From the above it will be seen that .a locking device is provided for sparr plugs whereby said plugs may be entirely encased, after wires have been disconnected therefrom for preventing an unauthorized per son from operating the engine. It will also be seen that the device is formed from a minimum number of parts, consequently may be easily and quickly applied to an engine and the device is durable.

The invention having been set forth what is claimed as new and useful is:

1. The combination with an engine, spark plugs carried by said engine, of a housing and locking device for said spark plugs, said device comprising a bar disposed above the spark plugs, spaced chambered members carried by said bar for the reception of the spark plugs, of means whereby said bar may be securely locked to the engine.

2. The combination with an engine, spark plugs carried by said engine, of a housing and locking device for said spark plugs, said device comprising a bar disposed above the spark plugs, chambered members carried by said bar for the reception of the spark plugs, an arm carried by said bar, and means whereby said arm may be securely locked to the engine. I

JAMES PADDEN. 

